UMA for pin unlock success/failure.

chromeos/login/auth/auth_status_consumer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_LOGIN_AUTH_AUTH_STATUS_CONSUMER_H_
 #define CHROMEOS_LOGIN_AUTH_AUTH_STATUS_CONSUMER_H_
 
 #include <string>
 
 #include "base/logging.h"
@@ skipping 77 matching lines @@
         return "OAuth2 token fetch failed.";
       default:
         NOTREACHED();
         return std::string();
     }
   }
 
   const GoogleServiceAuthError& error() const { return error_; }
   const FailureReason& reason() const { return reason_; }
 
+  void SetIsPinAttempt(bool tried_pin) { is_pin_attempt_ = tried_pin; }

[jdufault, 2016/08/08 18:54:26]

set_used_pin(bool used_pin) { used_pin_ = used_pin; }

[sammiequon, 2016/08/09 00:31:25]

Done.

+  bool IsPinAttempt() const { return is_pin_attempt_; }

[jdufault, 2016/08/08 18:54:26]

bool used_pin() const { return used_pin_; }

[sammiequon, 2016/08/09 00:31:25]

Done.

+
  private:
   AuthFailure(FailureReason reason, GoogleServiceAuthError error)
       : reason_(reason), error_(error) {}
 
+  bool is_pin_attempt_ = false;

[jdufault, 2016/08/08 18:54:26]

Instead of plumbing through AuthStatusConsumer we can just move this variable to
ScreenLocker, similar to incorrect_password_count_.

[sammiequon, 2016/08/09 00:31:25]

Done.

   FailureReason reason_;
   GoogleServiceAuthError error_;
 };
 
 // An interface that defines the callbacks for objects that the
 // Authenticator class will call to report the success/failure of
 // authentication for Chromium OS.
 class CHROMEOS_EXPORT AuthStatusConsumer {
  public:
   virtual ~AuthStatusConsumer() {}
   // The current login attempt has ended in failure, with error |error|.
   virtual void OnAuthFailure(const AuthFailure& error) = 0;
 
   // The current login attempt has succeeded for |user_context|.
   virtual void OnAuthSuccess(const UserContext& user_context) = 0;
   // The current guest login attempt has succeeded.
   virtual void OnOffTheRecordAuthSuccess() {}
   // The same password didn't work both online and offline.
   virtual void OnPasswordChangeDetected();
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_LOGIN_AUTH_AUTH_STATUS_CONSUMER_H_